Health Q&A: Despite popularity benefits of fish oil unclear

A: Fish oil supplements are rich in Omega-3 fatty acids. The benefits of the supplements are not well established. For primary prevention — essentially to prevent a heart attack in people who don’t have heart disease — there is no evidence of benefit. In secondary prevention — preventing future events in people who already have heart disease — the evidence is inconclusive. Some studies suggest there might be some benefit, but this finding was not consistent.

Because of that, fish oil supplements are not recommended for people who do not have a history of heart disease. In people with an established history of heart problems, it is reasonable to consider taking supplements, although the benefits are unclear. Ideally, getting Omega-3 fatty acids from a healthy diet is the preferred option over supplements. This could be accomplished by eating fish twice a week. Omega-3 fatty acids also can be found in other dietary sources such as kale, spinach, flaxseeds, walnuts and cashews.